It's those tinder dry conditions out west that have many communities worried about fireworks on this 4th of july. In particular, back yard fireworks and, boy, do americans love their fireworks. Each year we spend $600 million on 4th of july fireworks. Two-thirds of that is spent by individuals on their own back yard dis splaz. It's those that have so many on edge. Reporter: It's like a pilgrimage. We do this every year, we make a family trip up. Reporter: Families in states where fireworks are banned, making the long trek to giant stores, on the other side of state lines. Where they don't ask questions. So you're buying contraband? Only if you get caught. It's not fourth of july without fireworks. Reporter: And it's not the fourth of july without accidents either. Every year fireworks cause 18,000 fires, nearly $32 million worth of property damage, and 8,000 visits to the emergency room. That's why four states ban them altogether. But there are still more than a dozen states that allow the biggest aerial fireworks to be sold. This year one of the the hottest items is the excalibur. The blast's radius -- the size of a basketball court. It's the kind of firework people will drive for hours to buy. Knowing darn well they'll be breaking the law when they cross back over the border and bring them home. My message is use good common sense. Make sure there is a sober adult in charge. Reporter: Adam casebolt and his father roger, came from north carolina. It is what it is. And we're not hurting nobody. Reporter: But authorities disagree. And this year, some of them are cracking down. Buyers beware, says this georgia fire chief. We are going to confiscate them and you can get up to one year in jail and a $1,000 fine. Reporter: And that's no way to spend the holiday. Steve osunsami, abc news, lake hartwell, south carolina.

This transcript has been automatically generated and may not be 100% accurate.

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